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NB/T 47010-2017 English PDF (NBT47010-2010)

NB/T 47010-2017_English: PDF (NB/T47010-2017)
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NB/T 47010-2017English245 Add to Cart 0--9 seconds. Auto-delivery Stainless and heat-resisting steel forgings for pressure equipment Valid NB/T 47010-2017
NB/T 47010-2010English95 Add to Cart 0--9 seconds. Auto-delivery Stainless and heat-resisting steel forgings for pressure equipment Obsolete NB/T 47010-2010


BASIC DATA
Standard ID NB/T 47010-2017 (NB/T47010-2017)
Description (Translated English) Stainless and heat-resisting steel forgings for pressure equipment
Sector / Industry Energy Industry Standard (Recommended)
Classification of Chinese Standard J32
Classification of International Standard 77.140.85
Word Count Estimation 17,114
Date of Issue 2017-03-28
Date of Implementation 2017-08-01
Older Standard (superseded by this standard) NB/T 47010-2010; JB/T 9626-1999
Quoted Standard GB/T 222; GB/T 223; GB/T 226; GB/T 228.1; GB/T 228.2; GB/T 231.1; GB/T 6394; GB/T 10561; GB/T 11170; GB/T 13298; GB/T 13305; GB/T 20066; GB/T 20123; GB/T 20124; NB/T 47013.3; NB/T 47013.5
Drafting Organization Hefei General Machinery Research Institute
Administrative Organization National Boiler and Pressure Vessel Standardization Technical Committee
Regulation (derived from) State Energy Bureau Announcement No. 6 of 2017
Summary This standard specifies the terms and definitions of stainless steel and heat-resistant steel forgings for pressure equipment, ordering content, technical requirements, test methods, inspection rules and signs and quality certificates.

BASIC DATA
Standard ID NB/T 47010-2010 (NB/T47010-2010)
Description (Translated English) Stainless and heat-resisting steel forgings for pressure equipment
Sector / Industry Energy Industry Standard (Recommended)
Classification of Chinese Standard J32
Classification of International Standard 77.140.85
Word Count Estimation 13,187
Date of Issue 2010-08-27
Date of Implementation 2011-12-15
Older Standard (superseded by this standard) JB 4728-2000
Quoted Standard GB/T 222-2006; GB/T 223; GB/T 228; GB/T 231.1; GB/T 6394; GB/T 10561; GB/T 11170; GB/T 20066; JB/T 4730.3
Drafting Organization Hefei General Machinery Research Institute
Administrative Organization National Standardization Technical Committee Boiler and Pressure Vessel
Regulation (derived from) ?National Energy Board Announcement 2010 No.3
Summary This standard specifies the pressure equipment with stainless and heat-resisting steel forgings technical requirements, test methods and inspection rules. This standard applies to the design pressure of less than 100MPa pressure equipment with stainless steel and heat-resistant steel plating.


NB/T 47010-2017 NB ENERGY INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.85 J 32 Replacing NB/T 47010-2010, JB/T 9626-1999 Stainless and heat-resisting steel forgings for pressure equipment ISSUED ON: MARCH 28, 2017 IMPLEMENTED ON: AUGUST 01, 2017 Issued by: National Energy Administration Table of Contents Foreword ... 3  1 Scope ... 5  2 Normative references ... 5  3 Terms and definitions ... 6  4 Order content ... 8  5 Technical requirements ... 9  6 Test method ... 16  7 Inspection rules ... 17  8 Markings and quality certificates ... 20  Appendix A (Informative) Forgings for boiler's matching valves AND special components ... 21  Appendix B (Normative) Additional requirements ... 22  Appendix C (Informative) High temperature mechanical properties ... 24  Stainless and heat-resisting steel forgings for pressure equipment 1 Scope This standard specifies the terms and definitions, order content, technical requirements, test methods, inspection rules, markings and quality certificates, of stainless steel and heat-resisting steel forgings for pressure equipment. 2 Normative references The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223 Steel, iron and alloy - Chemical analysis method (applicable part) GB/T 226 Test method for macrostructure and defect of steel by etching GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature GB/T 228.2 Metallic materials - Tensile testing - Part 2: Method of test at elevated temperature GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method GB/T 6394 Metal - Methods for estimating the average grain size GB/T 10561 Steel - Determination of content of non-metallic inclusion - Micrographic method using standard diagrams GB/T 11170 Stainless steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (Routine method) GB/T 13298 Inspection methods of microstructure for metals GB/T 13305 Micrographic method for determining area content of the α- phases in stainless steels GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition GB/T 20123 Steel and iron - Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method) GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas NB/T 47013.3 Nondestructive testing of pressure equipment - Part 3: Ultrasonic testing NB/T 47013.5 Nondestructive testing of pressure equipment - Part 5: Penetrant testing 3 Terms and definitions 3.1 Hollow forging Axisymmetric hollow forgings, which have an axial length L greater than its outer diameter D, as shown in Figure 1a). t is the nominal thickness. 3.2 Ring forging Axisymmetric hollow forgings, which have an axial length L less than or equal to its outer diameter D, as shown in Figure 1 b). The smaller of L and t is the nominal thickness. 3.3 Disk forging Axisymmetric solid forgings, which have an axial length L less than or equal to its outer diameter D, as shown in Figure 1c). L is the nominal thickness. 3.4 Bowl forging Axisymmetric forgings, which have a concave cross-section AND an axial length H less than or equal to its outer diameter D, as shown in Figure 1 d). The larger of t1 and t2 is the nominal thickness. 5.10.1 The shape, size, surface quality of the forging shall meet the requirements of the order drawing. 5.10.2 The outer surface of the forging shall be free of harmful defects, such as cracks, interlayers, folds, inclusions, etc., that are visible to the naked eye. 5.10.3 Defects, on the appearance of forgings, can be removed by machining or grinding. The grinding part shall have a smooth transition. The grinding depth shall meet the following requirements: a) For non-machined surfaces, the grinding depth shall not exceed the lower deviation of the nominal size, at this place; b) For the machined surface, the grinding depth shall not exceed 75% of the thickness allowance. 5.11 Welding repairs 5.11.1 Welding repairs for steel forgings are not allowed, without the consent of the buyer. 5.11.2 With the consent of the purchaser, the welding repair of steel forgings shall comply with the relevant regulations and standards. The position, depth, area, welding consumables, welding process, welder qualification requirements, non-destructive testing methods before and after welding repair, qualification level, etc., shall be negotiated, between the supplier and the buyer. 5.11.3 The supplier shall provide the purchaser, with a schematic diagram of the location, depth and area of the welding repair for forgings, welding materials, welding process parameters, as well as non-destructive test reports. 5.12 Additional requirements According to the requirements of the buyer, as negotiated between the supplier and the buyer, AND indicated in the contract, it may add other inspection items in Appendix B. 6 Test method 6.1 Chemical analysis Chemical analysis is in accordance with GB/T 223 or GB/T 11170, GB/T 20123, GB/T 20124. The arbitration test is in accordance with GB/T 223. 6.2 Tensile test The room temperature tensile test is in accordance with the provisions of GB/T 228.1. The high temperature tensile test is in accordance with the provisions of GB/T 228.2. 6.3 Hardness test The hardness test is in accordance with GB/T 231.1. 6.4 Macroscopic inspection The macroscopic inspection shall be in accordance with the provisions of GB/T 226. 6.5 Metallographic inspection The grain size inspection is in accordance with the provisions of GB/T 6394. The inspection of non-metallic inclusions shall be graded in accordance with the method A in GB/T 10561. The microstructure inspection shall be in accordance with the provisions of GB/T 13298. For the phase ratio inspection of duplex steel, it may use GB/T 13305 to determine the ferrite content. 6.6 Ultrasonic testing Ultrasonic testing is in accordance with NB/T 47013.3. 6.7 Visual inspection The appearance inspection of forgings shall be visually inspected, under sufficient lighting conditions. 7 Inspection rules 7.1 Inspection The inspection of forgings is carried out by the supplier's inspection department. 7.2 Specimen requirements 7.2.1 The specimens, for chemical analysis, shall be prepared, in accordance with the provisions of GB/T 20066. 7.2.2 The tensile specimen shall be the No. R4 specimen in GB/T 228.1. If limited by the sampling size, according to the agreement between the supplier and the buyer, it may also use the No. R7 specimen in GB/T 228.1. 7.2.3 The hardness test of level I forgings can be carried out, on the rough surface of the forging blank AND at the sampling position, as shown in Figure 2. The hardness test specimens of other levels of forgings shall be prepared, in accordance with the provisions of GB/T 231.1. 7.3 Sampling quantity 7.3.1 Chemical analysis For chemical analysis, one specimen shall be taken for each furnace number. 7.3.2 Tension and impact 7.3.2.1 For forgings, which have a single heat treatment mass less than or equal to 3500 kg, it shall take 1 set specimens (1 tension at room temperature). 7.3.2.2 For forgings, which have a single heat treatment mass more than 3500 kg, it shall take 2 sets of specimens (1 tension at room temperature for each). The positions of the two sets of specimens are 180° apart. If the length of the forging is greater than 1.5 times the diameter, it shall take one set of specimens, each at both ends of the forging, at an interval of 180°. 7.3.3 Macroscopic inspection For macroscopic inspection, it shall take 1 specimen from each batch. 7.3.4 Metallographic inspection For metallographic inspection, it shall take 1 specimen from each batch. 7.4 Sampling direction For forgings (excluding bar forgings), it should take tangential specimens. When tangential specimens cannot be obtained, take longitudinal or radial specimens. For bar forgings, it should take longitudinal specimens. 7.5 Sampling location 7.5.1 For hollow forgings and ring forgings, it shall take specimens from the end of the forgings, at 1/2 of the wall thickness, as shown in Figure 2 a) and Figure 2 b). 7.5.2 For disk forgings, it shall take specimen from the end of the forging. When the diameter of the disk forging is less than or equal to 350 mm, it shall take specimens from the outer edge. When the diameter is greater than 350 mm, it shall take specimens inwards, at the position more than or equal to 20 mm from the edge, as shown in Figure 2 c). 7.5.3 For the bowl forging, it shall take specimen from the open end of the forging, at the 1/2 position of the wall thickness, as shown in Figure 2 d). test specimens, from the vicinity of the original sampling location of the inspected forging, for re-inspection. All data of the re-inspection result shall meet the requirements of Table 3. 7.6.3 When the mechanical performance test or re-inspection is unqualified, the batch (piece) of forgings is allowed to be inspected, after re-heat treatment. However, the number of re-heat treatment shall not exceed 2. 8 Markings and quality certificates 8.1 The marking shall be printed on the obvious part of the forging OR the place designated by the purchaser. The position and method, of printing the mark, shall not affect the final use of the forging. For small forgings, a mark can be affixed on the packing box. 8.2 Forgings, which are inspected and delivered, according to this standard, shall have the following marks: a) The name (or code) of the forging manufacturer; b) Standard number; c) Material designation; d) Forging level; e) Batch number. 8.3 When the forgings are delivered, they shall be accompanied by a quality certificate, which includes: a) Forging manufacturer; b) Order contract number; c) Standard number, material designation, forging level, batch number, quantity of forgings; d) Various inspection results, signatures and seals of inspection units and inspectors; e) Heat treatment curve (copy); f) The inspection results of the special requirements, which are specified in the contract. Appendix B (Normative) Additional requirements This requirement is implemented, only when the buyer stipulates in the order contract. It may use one or more of them. The details of the additional requirements shall be negotiated by the supplier and the buyer. B.1 Simulated post-weld heat treatment of specimen blank for mechanical properties Before the mechanical property test, all specimen blanks shall be heat treated one or more times, below the critical temperature, which is mainly based on the expectation that, forging products will subject to post-weld heat treatment or other heat treatments, during the container manufacturing process. The buyer shall provide the supplier, with detailed heat treatment specifications, including temperature, holding time, cooling rate. B.2 Use thermal buffer ring or ring segment for heat treatment Before the heat treatment of the forging, weld the edge of a thermal buffer ring, which has a section of at least t x t (t is the nominal thickness of the forging) OR a ring segment, which has a section of at least t x t and an arc length of at least 3t, on the sampling end of the forging. The thermal buffer ring or ring segment is made of carbon steel or low alloy steel, which has good weldability. After the forging is heat treated, cut off the thermal buffer ring or ring segment. The specimen is taken from the area of the forging, that is thermally buffered by the thermal buffer ring or ring segment. When a thermal buffer ring segment is used, the specimen shall be taken, from the forging part corresponding to the middle 1/3 of the arc length, of the thermal buffer ring segment. The position of the specimen shall be at least 13 mm, away from the thermal buffer surface of the forging, AND at least t/4 from the heat-treated surface of the forging. B.3 Corrosion test The corrosion test requirements for forgings shall be negotiated between the supplier and the buyer. B.4 Penetration testing Penetration testing method can be in accordance with the provisions of NB/T 47013.5. The level I is qualified. B.5 Metallographic inspection ......


NB/T 47010-2010 ICS 77.140.85 J 32 INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA NB/T 47010-2010 (JB/T 4728) Replacing JB 4728-2000 Stainless and Heat-Resisting Steel Forgings for Pressure Equipment ISSUED ON. AUGUST 27, 2010 IMPLEMENTED ON. DECEMBER 15, 2011 Issued by. National Energy Administration NB Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 6 4 Order Contents ... 7 5 Technical Requirements ... 8 6 Test Methods ... 13 7 Inspection Rules ... 13 8 Marking and Quality Certificate ... 15 Annex A (Normative) Additional Requirements ... 17 Annex B (Informative) Steel Grade Comparison Between the New and Old Standards ... 19 Foreword Compared with JB 4728-2000, this Standard has the following main changes. - Design pressure in application scope has been improved from not greater than 35 MPa to less than 100 MPa; - Steel grade in this Standard adopts unified numerical code; ADD steel grade comparison between the new and old standards in Annex B (Informative); - ADD two austenitic stainless steel grades (S31703 and S39042); four austenitic heat-resisting steel grades (S30409, S34779, S31609 and S31008); two austenitic - ferritic stainless steel grades (S22253 and S220553); - REDUCE sulfur contents in a majority of steel grades; - ENLARGE nominal thickness range of all the steel forgings; - IMPROVE tensile strength index of steel forging with nominal thickness greater than 100 mm; - It is specified that Class I forgings are only applicable to S11306 and S30408 steel grades with nominal thickness less than or equal to 150 mm. Annex A of this Standard is normative, and Annex B is informative. This Standard was proposed by and under the jurisdiction of the National Technical Committee on Boilers and Pressure Vessels of Standardization Administration of China (SAC/TC 262). Drafting organizations of this Standard. Hefei General Machinery Research Institute, China National General Machinery Engineering Corporation, China Special Equipment Inspection and Research Institute, Anhui Bureau of Quality and Technical Supervision, Wuxi Falan Forging Co., Ltd., Shanghai Power Equipment Research Institute, Nanjing Develop Industry Co., Ltd., Changzhou Sunshine General Petrochemical Fittings Co., Ltd. Drafting staffs of this Standard. Zhang Xiaohu, Qin Xiaozhong, Zhang Yong, Yang Guoyi, Ai Zhibin, Zhang Rui, Teng Deming, Chen Zhiwei, Yin Lijun, Zhang Li. National Technical Committee on Boilers and Pressure Vessels of Standardization Administration of China (SAC/TC 262) is in the charge of the explanation of this Standard. The previous editions of the standards replaced by this Standard are. Stainless and Heat-Resisting Steel Forgings for Pressure Equipment 1 Scope This Standard specifies the technical requirements, test methods and inspection rules of stainless and heat-resisting steel forgings for the pressure equipment’s. This Standard is applicable to the stainless and heat-resisting steel forgings for pressure equipment’s with a design pressure less than 100 MPa. 2 Normative References The following documents are indispensable for the application of this Standard. For dated references, only the dated edition is applicable to this document. For undated references, the latest editions of the normative documents (including all the amendments) are applicable to this document. GB/T 222-2006 Permissible Tolerances for Chemical Composition of Steel Products GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature (ISO 6892.1998 (E)) GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1. Test Method (ISO 6506-1.2005) GB/T 6394 Metal-methods for Estimating the Average Grain Size (ASTM E112.1996) GB/T 10561 Steel Determination of Content of Nonmetallic Inclusions - Micrographic Method Using Standards Diagrams (ISO 4967.1998) GB/T 11170 Stainless Steel - Determination of Multi-Element Contents - Spark Discharge Atomic Emission Spectrometric Method (Routine Method) GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition (ISO 14284.1996) JB/T 4730.3 Nondestructive Testing of Pressure Equipment - Part 3. Ultrasonic Testing 3 Terms and Definitions For the purposes of this Standard, the following terms and definitions apply. 3.1 Hollow forging It refers to the axisymmetrical hollow forging, whose axial length L is greater than its outer diameter D, as shown in Fig. 1 a). t shall be the nominal thickness. 3.2 Ring forging It refers to the axisymmetrical hollow forging whose axial length L is less than or equal to its outer diameter D, as shown in Fig. 1 b). The smaller one of L and t shall be the nominal thickness. 3.3 Disk forging It refers to the axisymmetrical solid forging, whose axial length L is less than or equal to its outer diameter D, as shown in Fig. 1 c). L shall be the nominal thickness. 3.4 Bowl forging It refers to the axisymmetrical forging with concave section, whose height H is less than or equal to its outer diameter D, as shown in Fig. 1 d). The greater one of t1 and t2 shall be the nominal thickness. 3.5 Neck flange forging It refers to the axisymmetrical hollow forging with two axials outside diameters, as shown in Fig. 1 e). The greater one of t1 and t2 shall be the nominal thickness. 3.6 Bar forging It refers to the solid forging with circular section, whose axial length L is greater than its outer diameter D, as shown in Fig. 1 f). D shall be the nominal thickness. 4.2 The Buyer shall provide order drawing. 4.3 When the additional requirements in Annex A (Normative) of this Standard and other requirements which exceed or are higher than this Standard are used, they shall be indicated in the order contract by the Buyer. 5 Technical Requirements 5.1 Smelting process The steel for forging shall be smelted through electric furnace or oxygen converter and also shall adopt external refining process. 5.2 Chemical Compositions 5.2.1 Chemical compositions (heat analysis) of the steel for forging shall be in accordance with those specified in Table 1. 5.2.2 The Buyer may carry out product analysis, the allowable deviation between the analysis results and the specified values in Table 1 shall comply with the requirements in Table 3 of GB/T 222. 5.3 Forging 5.3.1 Steel ingot, billet steel, rolled metal used for forging shall be accompanied with the quality certificate of the smelter. 5.3.2 Steel ingots to be used to produce forgings shall have sufficient cut-off quantities at their tops & bottoms, ensuring no shrinkage cavity, serious segregation and other defects within the forgings. 5.3.3 Forging ratio of main section of the forging shall not be less than 3 (not less than 2 for electroslag remelting steel) when steel ingot or billet steel is used for forging. And the forging ratio of main section of the forging shall not be less than 1.6 when rolled metal is used for forging. 5.3.4 The forging shall be formed through hot working by press, forging hammer or rolling mills, the metal on the whole section shall be forged thoroughly and should be close to the shape and dimension of the finished parts as far as possible. 5.4 Forging class Forgings are divided into four classes of I, II, III and IV. The inspection item of each class shall follow the requirements in Table 2. Class I forging is only applicable to S11306 and S30408 steel forgings of nominal thickness less than or equal to 150 mm. Table 2 Forging class Inspection item Inspection quantity I Hardness (HBW) Piece-by-piece inspection II Tension (Rm, Rp0.2, A) Inspect one forging randomly from each batch composed of the forgings of the same smelting furnace number and heat treated in the same furnace III Tension (Rm, Rp0.2, A) Ultrasonic testing Piece-by-piece inspection IV Tension (Rm, Rp0.2, A) Piece-by-piece inspection Ultrasonic testing Piece-by-piece inspection 5.5 Heat treatment Forgings shall be delivered at the heat treatment state specified in Table 3. If the 6 Test Methods 6.1 Chemical analysis Chemical analysis shall be in accordance with GB/T 223 or GB/T 11170. Arbitration test shall be in accordance with GB/T 223. 6.2 Hardness test Hardness test shall be in accordance with GB/T 231.1. Other determination methods may also be used as required. 6.3 Tensile test Tensile test shall be in accordance with GB/T 228. 6.4 Ultrasonic testing Ultrasonic testing shall be in accordance with JB/T 4730.3. 7 Inspection Rules 7.1 Forgings shall be inspected by the Supplier's inspection department according to the order contract. 7.2 Specimen for chemical analysis shall be prepared according to GB/T 20066. One specimen shall be taken from each s... ......

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